server-functions

Create server-side functions with TanStack Start's createServerFn utility.

Updated Nov 19, 2025

Search Tags:#authentication #api #server functions #tanstack start #backend #data validation

Ready to run

npx skills add https://github.com/alexturpin/cf-app-starter --skill server-functions-alexturpin

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: server-functions
Source: https://github.com/alexturpin/cf-app-starter/tree/main/.opencode/skills/server-functions
Command: npx skills add https://github.com/alexturpin/cf-app-starter --skill server-functions-alexturpin

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill simplifies the creation and management of server-side functions within a web application, enabling developers to implement backend logic efficiently.

Core Features & Use Cases

Server Function Creation: Utilizes createServerFn for defining server-side operations.
Data Validation: Integrates Zod for robust input data validation.
Authentication Middleware: Supports adding authentication guards to protect server functions.
Use Case: Securely handle user profile updates by creating an authenticated server function that validates incoming data and updates the user's record in the database.

Quick Start

Create a new POST endpoint for server-side logic using createServerFn.

Frequently Asked Questions about server-functions

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I create server functions with TanStack Start for backend API operations?▼

To create server functions with TanStack Start, utilize the `createServerFn` utility to define server-side operations, manage API endpoints, and handle asynchronous HTTP requests for dynamic web applications.

Can I add authentication middleware to protect server functions in TanStack Start?▼

Yes, you can protect server functions by adding authentication middleware guards using `createServerFn`, ensuring only authorized users can access specific backend operations and API endpoints.

How do I validate input data for server functions using Zod?▼

Validate input data for server functions by integrating Zod schemas within your `createServerFn` implementation to robustly validate incoming API requests before processing backend operations.

What is the best way to securely handle user profile updates with TanStack Start?▼

The best way to securely handle user profile updates is creating an authenticated server function with `createServerFn` that validates incoming data with Zod and updates the database record.

Does TanStack Start server functions support various HTTP methods for dynamic web applications?▼

Yes, TanStack Start server functions support various HTTP methods, enabling developers to create POST endpoints and handle asynchronous requests dynamically for backend API operations.

When do I need server functions instead of traditional API routes for backend logic?▼

You need server functions when you want to simplify backend logic management by defining server-side operations directly using `createServerFn`, integrating data validation and authentication without maintaining separate traditional API route files.